Wolf (& Rabbit!) That is certainly an alternative! It is a good one too. I have done many of those, some of which were done on the back of a napkin, and at least one was done on one of the 2×4′s making up the railing in my garage. :)
And, even though I like the occasional session with my hand planes, chisels and old diston handsaw… I still enjoy the table saw, thickness planer and router as well.
Last night I gave QCad a try. It seems pretty usable. I have, so far only done otho’s with it, but it does have an iso grid so in theory I could give that a try too.